You can produce said computer, but said computer could easily be a mass delusion that we are all suffering from. Various scientific measurements obtained confirming the existence of the computer could also be in error, or our use of the scientific measurements could also be part of a mass delusion.
I believe the only way humans can obtain knowledge is through subjective means (since at some point, our brains are used in interpretation), thus all current knowledge we have is subjective in nature. Physical evidence certainly helps us confirm a subjective truth, but it doesn't make it objective, since physical evidence itself has to be observed by us in the same way the truth is observed.
What would I consider a subjective truth? Every piece of knowledge we have gained so far in human history. Some of them may be objective knowledge as well, but we have no way of telling subjective knowledge from objective knowledge, and certainly no way of confirming something as objective knowledge.
I believe the only way humans can obtain knowledge is through subjective means (since at some point, our brains are used in interpretation), thus all current knowledge we have is subjective in nature. Physical evidence certainly helps us confirm a subjective truth, but it doesn't make it objective, since physical evidence itself has to be observed by us in the same way the truth is observed.
What would I consider a subjective truth? Every piece of knowledge we have gained so far in human history. Some of them may be objective knowledge as well, but we have no way of telling subjective knowledge from objective knowledge, and certainly no way of confirming something as objective knowledge.